EP0033701B1 - Dispositif à vis pointeau pour le réglage du débit d'un fluide - Google Patents

Dispositif à vis pointeau pour le réglage du débit d'un fluide Download PDF

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Publication number
EP0033701B1
EP0033701B1 EP19810400155 EP81400155A EP0033701B1 EP 0033701 B1 EP0033701 B1 EP 0033701B1 EP 19810400155 EP19810400155 EP 19810400155 EP 81400155 A EP81400155 A EP 81400155A EP 0033701 B1 EP0033701 B1 EP 0033701B1
Authority
EP
European Patent Office
Prior art keywords
needle screw
cylindrical housing
screw
needle
smooth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19810400155
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0033701A2 (fr
EP0033701A3 (en
Inventor
Jean Debray
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sourdillon SA
Original Assignee
Sourdillon SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sourdillon SA filed Critical Sourdillon SA
Publication of EP0033701A2 publication Critical patent/EP0033701A2/fr
Publication of EP0033701A3 publication Critical patent/EP0033701A3/fr
Application granted granted Critical
Publication of EP0033701B1 publication Critical patent/EP0033701B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members

Definitions

  • the invention relates to needle screw devices for adjusting the flow rate of a fluid, in particular a gas.
  • the invention applies more particularly to needle screw devices used in gas supply valves for burners of household appliances, such devices being mounted in these valves to obtain a correct adjustment of the gas flow rate suitable for idling.
  • the first of these drawbacks lies in the existence of a return torque generated by the sealing member mounted between the smooth parts facing the cylindrical housing and the needle screw; in fact, this sealing member is most often constituted by an O-ring which undergoes elastic deformation when, to obtain the desired adjustment, action is taken on the needle screw to rotate it in one direction or the other.
  • This elastic deformation stores energy in the form of a restoring torque which, when one ceases to act on the needle screw after having brought it by a rotary movement in an angular position corresponding to the desired flow rate, causes a rotation of the needle screw in the opposite direction to the direction of the above-mentioned rotational movement which had brought said needle screw into its correct angular position.
  • the second drawback lies in an imprecise positioning between the axis of the needle screw and the axis of the cylindrical housing: there can therefore be a significant misalignment between the axial orifice of the cylindrical housing forming a seat and the internal end of the screw. needle forming valve.
  • the adjustment is very imprecise due to the asymmetry of the passage delimited by the axial orifice and the internal end; this imprecision is further aggravated by the uncertain angular position of the pc'nteau screw due to the return torque generated by the sealing member.
  • the sealing member of the O-ring type always has larger proportions (especially in section) when the diameter of the device is reduced, and, therefore, its return torque is proportionally greater.
  • the object of the invention is precisely to remedy the two drawbacks mentioned above.
  • the external end of the needle screw opposite its internal end comprises a flared and deformable part whose outside diameter, when the needle screw is not in place, is greater than the internal diameter of the part of the cylindrical housing in which this external end is housed when the needle screw is put in place, which makes it possible, when the needle screw is put in place, on the one hand, effective rotation locking of the needle screw, due to the friction between the flared and deformable part and the smooth part, and, on the other hand, precise positioning between the axis of the needle screw and the axis of the cylindrical housing , due to the centering of the flared and deformable part in the smooth part.
  • the flared and deformable part of the external end of the needle screw comprises two zones delimiting between them a diametrical slot which constitutes the means for actuating the needle screw in rotation, actuation means which are actuated by a tool with screwdriver blade.
  • the outer end of the needle screw may include a circular groove formed approximately at the bottom of the diametrical slot.
  • the invention consists of a number of other arrangements which are preferably used at the same time and which will be more explicitly discussed below.
  • Figure 1 of this drawing shows, in axial section, a gas flow adjustment device with needle screw established in accordance with the invention, the needle screw being shown in a position partially engaged in the cylindrical housing.
  • Figure 2 shows, in partial view, this same device, the needle screw being engaged in the cylindrical housing and occupying a position corresponding to the minimum gas flow.
  • FIG. 3 also shows this same device, the needle screw being engaged in the cylindrical housing and occupying a position corresponding to a gas flow rate greater than the minimum.
  • a device has been shown with a needle screw for adjusting the flow rate of a gas, more particularly suitable for being mounted in a gas supply valve of a burner of an appliance for household use.
  • This device is mounted in this valve to obtain a correct adjustment of the gas flow rate suitable for idling.
  • This device comprises a cylindrical housing 1 comprising a threaded part 1a and a smooth part 1b; an axial orifice 2 forming a seat is formed at the bottom 1c of this cylindrical housing, this axial orifice 2 communicating with a first gas circulation conduit 3 which may, for example, be a conduit for the flow of gas to the burner (not shown) .
  • a needle screw 4 comprising a threaded part 4a cooperating with a threaded part 1a of the cylindrical housing 1, a smooth part 4b, opposite the smooth part 1b of the cylindrical housing 1, and a internal end 5 forming a valve for cooperating with the orifice 2 forming the seat of the cylindrical housing 1.
  • a radial orifice 6 opens into a space 7 delimited by the needle screw 4 and the cylindrical housing 1; this radial orifice 6 communicates with a second gas circulation conduit 8 which may, for example, be an inlet conduit for the gas from the valve, not shown, supplying the burner in question.
  • the internal end 5 of the needle screw 4 may include a set of channels 9, comprising a calibrated passage 10, and through which there is a permanent communication between the inlet duct 8 and the starting conduit 3, regardless of the position of the needle screw in the cylindrical housing.
  • the minimum value of the gas flow rate passing through such an adjustment device (for example in the case of the use of butane gas), is therefore fixed by the calibrated passage and is obtained for a position of the needle screw in the cylindrical housing in which the valve formed by the internal end 5 of the needle screw is in abutment on the seat formed by the axial orifice 2 of the cylindrical housing (fig. 2 on which the arrow F shows the path of the gas).
  • the value of the gas flow rate greater than the minimum is obtained by acting on the needle screw, so that the valve, formed by the internal end 5 of the needle screw, is moved away from the seat formed by the axial orifice 2 of the cylindrical housing (fig. 3 on which the arrows F show the path of the gas).
  • a sealing member 11 is provided, of the O-ring type, between the smooth parts 1b and 4b opposite the cylindrical housing 1 and the needle screw respectively.
  • This sealing member is preferably housed in a groove 12 formed in the needle screw 4.
  • Rotation actuation means 13 are then provided to allow the user to rotate, in one direction or the other, the needle screw 4.
  • the outer end 14 of the needle screw 4, opposite its internal end 5, has a flared portion 15 whose outer diameter D, when the needle screw 4 is not in place (fig. 1) is greater to the internal diameter d of the part of the cylindrical housing 1 in which this external end 14 is housed during the positioning of the needle screw 4 (fig. 2 and 3).
  • the flared and deformable part 15 of the external end 14 of the needle screw comprises two zones 15a and 15b delimiting between them a diametrical slot 16 which constitutes the means of actuation in rotation 13 of the needle screw 4, means of actuation which are controlled by a blade tool of the screwdriver type.
  • These two zones 15a and 15b are preferably obtained by outward deformation from the diametrical slot 16.
  • the outer end 14 of the needle screw 4 has a circular groove 17 formed approximately at the bottom 16a of the diametrical slot 16.
  • the internal end 5 of the needle screw 4 so that it has a frustoconical part 5a intended to cooperate with the edge 2a of the axial orifice 2 of the cylindrical housing 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Feeding And Controlling Fuel (AREA)
EP19810400155 1980-02-01 1981-02-02 Dispositif à vis pointeau pour le réglage du débit d'un fluide Expired EP0033701B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8002293 1980-02-01
FR8002293A FR2482237A1 (fr) 1980-02-01 1980-02-01 Perfectionnements apportes aux dispositifs a vis pointeau pour le reglage du debit d'un fluide

Publications (3)

Publication Number Publication Date
EP0033701A2 EP0033701A2 (fr) 1981-08-12
EP0033701A3 EP0033701A3 (en) 1981-11-04
EP0033701B1 true EP0033701B1 (fr) 1984-04-11

Family

ID=9238133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810400155 Expired EP0033701B1 (fr) 1980-02-01 1981-02-02 Dispositif à vis pointeau pour le réglage du débit d'un fluide

Country Status (4)

Country Link
EP (1) EP0033701B1 (cg-RX-API-DMAC10.html)
DE (1) DE3163027D1 (cg-RX-API-DMAC10.html)
ES (1) ES8201282A1 (cg-RX-API-DMAC10.html)
FR (1) FR2482237A1 (cg-RX-API-DMAC10.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100558835B1 (ko) * 2003-06-26 2006-03-10 다이헤이요고교 가부시키가이샤 밸브 마개 및 밸브

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI69349C (fi) * 1983-05-10 1986-01-10 Niskanen Erkki Oy Spindelventil foer ett roersystem foer vaetskor
GR1001580B (el) * 1992-09-07 1994-05-31 Athanasios Zisopoulos Σύστημα ρύ?μισης του ανοίγματος του ακροφυσίου (πίπας) της τουρμπίνας αυτοκινούμενης αρδευτικής μηχανής (καρούλι).
ITMI20120289A1 (it) * 2012-02-27 2013-08-28 Dropsa Spa Dispositivo di lubrificazione con regolazione della portata di lubrificante fluido
ITMI20120288A1 (it) 2012-02-27 2013-08-28 Dropsa Spa Dispositivo di lubrificazione con misuratore di portata
CN108058921A (zh) * 2017-11-23 2018-05-22 北京特种机械研究所 一种包装箱自封活门

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1428745A (en) * 1921-05-28 1922-09-12 Ingersoll Rand Co Valve-spindle-retaining device
US2640521A (en) * 1949-06-01 1953-06-02 Eagle Lock Company Split head locking screw
DE1061589B (de) * 1956-12-27 1959-07-16 Robinetterie De Prec Sa Abdichtung des Betaetigungsgliedes von Armaturen
US3169565A (en) * 1961-06-14 1965-02-16 Texas Instruments Inc Self locking screw
US3473781A (en) * 1966-03-10 1969-10-21 Ross Operating Valve Co Adjustable exhaust restrictor
ES134888Y (es) * 1967-12-23 1968-09-01 Industrias Copreci, S. C. I. Grifo perfeccionado para gases.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100558835B1 (ko) * 2003-06-26 2006-03-10 다이헤이요고교 가부시키가이샤 밸브 마개 및 밸브

Also Published As

Publication number Publication date
FR2482237A1 (fr) 1981-11-13
ES499162A0 (es) 1981-12-16
EP0033701A2 (fr) 1981-08-12
FR2482237B1 (cg-RX-API-DMAC10.html) 1984-09-14
ES8201282A1 (es) 1981-12-16
EP0033701A3 (en) 1981-11-04
DE3163027D1 (en) 1984-05-17

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